....if you are looking to upgrade from your stock pipes, these American Classic II pipes from Hard Krome definitely don't purrrrr......they Rock! They have beautiful lines...turn heads.....and look like they were part of the original design of the bike. Also very easy to install - takes about an hour of careful work with a buddy. All parts are machined to really close specs, so you won't have to mod the mod so to speak. At 110 dB.....these are loud if you run with no baffles. So ease out that clutch when the squad car is in your mirrors! If you need to quiet them down, you can get custom baffles for them from Smartpartz in Cali - 2.5" Hard Kore Quiet Baffles. Definitely recommend.....